A process and an apparatus for purification of waste oil or...

C - Chemistry – Metallurgy – 10 – M

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C10M 175/00 (2006.01) B01D 39/18 (2006.01) B01D 39/20 (2006.01)

Patent

CA 2491162

The present invention relates to a process and an apparatus for the purification of waste oil or re-refined oil from mineral or synthetic oil. The process comprises the steps of prefiltration of the oil followed by passing the prefiltrated oil through a filtering unit in which the filter medium comprises organic fibres and carbon particles, said organic fibres and carbon particles being adhered to each other by a binder. By performing the process the waste oil is purified and hydrogen sulfide and residues from carbonization are effectively removed. Problems concerning blocking of the filters are reduced and the process is carried out in a continuous way resulting in a continuous flow.

La présente invention se rapporte à un procédé et à un appareil de purification d'une huile usagée ou d'une huile régénérée provenant d'une huile minérale ou synthétique. Le procédé comprend une étape de préfiltration de l'huile suivie du filtrage de l'huile préfiltrée à travers une unité de filtrage dans laquelle le milieu filtrant comporte des fibres organiques et des particules de carbone, lesdites fibres organiques et particules de carbone étant liées les unes aux autres par un liant. La mise en oeuvre de ce procédé permet de purifier l'huile usagée et de supprimer efficacement le sulfure d'hydrogène et les résidus de la carbonisation. Le procédé de l'invention permet de réduire les problèmes liés au blocage des filtres et il est mis en oeuvre de manière continue, ce qui assure un flux continu.

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